FROM openjdk:8-jre

ENV CATALINA_HOME /usr/local/tomcat
ENV PATH $CATALINA_HOME/bin:$PATH
RUN mkdir -p "$CATALINA_HOME"
WORKDIR $CATALINA_HOME

# let "Tomcat Native" live somewhere isolated
ENV TOMCAT_NATIVE_LIBDIR $CATALINA_HOME/native-jni-lib
ENV LD_LIBRARY_PATH ${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}$TOMCAT_NATIVE_LIBDIR

# runtime dependencies for Tomcat Native Libraries
# Tomcat Native 1.2+ requires a newer version of OpenSSL than debian:jessie has available
# > checking OpenSSL library version >= 1.0.2...
# > configure: error: Your version of OpenSSL is not compatible with this version of tcnative
# see http://tomcat.10.x6.nabble.com/VOTE-Release-Apache-Tomcat-8-0-32-tp5046007p5046024.html (and following discussion)
# and https://github.com/docker-library/tomcat/pull/31
ENV OPENSSL_VERSION 1.1.0f-3
RUN { \
		echo 'deb http://deb.debian.org/debian stretch main'; \
	} > /etc/apt/sources.list.d/stretch.list \
	&& { \
# add a negative "Pin-Priority" so that we never ever get packages from stretch unless we explicitly request them
		echo 'Package: *'; \
		echo 'Pin: release n=stretch'; \
		echo 'Pin-Priority: -10'; \
		echo; \
# except OpenSSL, which is the reason we're here
		echo 'Package: openssl libssl*'; \
		echo "Pin: version $OPENSSL_VERSION"; \
		echo 'Pin-Priority: 990'; \
	} > /etc/apt/preferences.d/stretch-openssl
RUN apt-get update && apt-get install -y --no-install-recommends \
		libapr1 \
		openssl="$OPENSSL_VERSION" \
	&& rm -rf /var/lib/apt/lists/*

# see https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/KEYS
# see also "update.sh" (https://github.com/docker-library/tomcat/blob/master/update.sh)
ENV GPG_KEYS 05AB33110949707C93A279E3D3EFE6B686867BA6 07E48665A34DCAFAE522E5E6266191C37C037D42 47309207D818FFD8DCD3F83F1931D684307A10A5 541FBE7D8F78B25E055DDEE13C370389288584E7 61B832AC2F1C5A90F0F9B00A1C506407564C17A3 713DA88BE50911535FE716F5208B0AB1D63011C7 79F7026C690BAA50B92CD8B66A3AD3F4F22C4FED 80FF76D88A969FE46108558A80B953A041E49465 8B39757B1D8A994DF2433ED58B3A601F08C975E5 A27677289986DB50844682F8ACB77FC2E86E29AC A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 B3F49CD3B9BD2996DA90F817ED3873F5D3262722 DCFD35E0BF8CA7344752DE8B6FB21E8933C60243 F3A04C595DB5B6A5F1ECA43E3B7BBB100D811BBE F7DA48BB64BCB84ECBA7EE6935CD23C10D498E23
RUN set -ex; \
	for key in $GPG_KEYS; do \
		gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
	done

ENV TOMCAT_MAJOR 6
ENV TOMCAT_VERSION 6.0.53

# https://issues.apache.org/jira/browse/INFRA-8753?focusedCommentId=14735394#comment-14735394
ENV TOMCAT_TGZ_URL https://www.apache.org/dyn/closer.cgi?action=download&filename=tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz
# not all the mirrors actually carry the .asc files :'(
ENV TOMCAT_ASC_URL https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz.asc

RUN set -x \
	\
	&& wget -O tomcat.tar.gz "$TOMCAT_TGZ_URL" \
	&& wget -O tomcat.tar.gz.asc "$TOMCAT_ASC_URL" \
	&& gpg --batch --verify tomcat.tar.gz.asc tomcat.tar.gz \
	&& tar -xvf tomcat.tar.gz --strip-components=1 \
	&& rm bin/*.bat \
	&& rm tomcat.tar.gz* \
	\
	&& nativeBuildDir="$(mktemp -d)" \
	&& tar -xvf bin/tomcat-native.tar.gz -C "$nativeBuildDir" --strip-components=1 \
	&& nativeBuildDeps=" \
		dpkg-dev \
		gcc \
		libapr1-dev \
		libssl-dev \
		make \
		openjdk-${JAVA_VERSION%%[-~bu]*}-jdk=$JAVA_DEBIAN_VERSION \
	" \
	&& apt-get update && apt-get install -y --no-install-recommends $nativeBuildDeps && rm -rf /var/lib/apt/lists/* \
	&& ( \
		export CATALINA_HOME="$PWD" \
		&& cd "$nativeBuildDir/native" \
		&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
		&& ./configure \
			--build="$gnuArch" \
			--libdir="$TOMCAT_NATIVE_LIBDIR" \
			--prefix="$CATALINA_HOME" \
			--with-apr="$(which apr-1-config)" \
			--with-java-home="$(docker-java-home)" \
			--with-ssl=yes \
		&& make -j$(nproc) \
		&& make install \
	) \
	&& apt-get purge -y --auto-remove $nativeBuildDeps \
	&& rm -rf "$nativeBuildDir" \
	&& rm bin/tomcat-native.tar.gz

# TODO find a simple hacky way to verify Tomcat Native is working properly
# (the way we use in 7+ doesn't work here because we have no "configtest")

EXPOSE 8080
CMD ["catalina.sh", "run"]
